<template>
	<div :class="{ hidden: hidden }" class="pagination-container">
		<el-pagination :background="background" :current-page.sync="currentPage" :page-size.sync="pageSize" :layout="layout" :page-sizes="pageSizes" :pager-count="pagerCount" :total="total" v-bind="$attrs" @size-change="handleSizeChange" @current-change="handleCurrentChange" />
	</div>
</template>

<script>
import { scrollTo } from "@/utils/scroll-to"
export default {
	name: "Pagination",
	props: {
		total: {
			required: true,
			type: Number
		},
		page: {
			type: Number,
			default: 1
		},
		limit: {
			type: Number,
			default: 20
		},
		pageSizes: {
			type: Array,
			default() {
				return [10, 20, 30, 50]
			}
		},
		// 移动端页码按钮的数量端默认值5
		pagerCount: {
			type: Number,
			default: document.body.clientWidth < 992 ? 5 : 7
		},
		layout: {
			type: String,
			default: "total, sizes, prev, pager, next, jumper"
		},
		background: {
			type: Boolean,
			default: true
		},
		autoScroll: {
			type: Boolean,
			default: true
		},
		hidden: {
			type: Boolean,
			default: false
		}
	},
	data() {
		return {
		}
	},
	computed: {
	  currentPage: {
	    get() {
	      return this.page
	    },
	    set(val) {
	      this.$emit('update:page', val)
	    }
	  },
	  pageSize: {
	    get() {
	      return this.limit
	    },
	    set(val) {
	      this.$emit('update:limit', val)
	    }
	  }
	},
	methods: {
		handleSizeChange(val) {
			if (this.currentPage * val > this.total) {
				this.currentPage = 1
			}
			this.$emit("pagination", { page: this.currentPage, limit: val })
			if (this.autoScroll) {
				scrollTo(0, 800)
			}
		},
		handleCurrentChange(val) {
			this.$emit("pagination", { page: val, limit: this.pageSize })
			if (this.autoScroll) {
				scrollTo(0, 800)
			}
		}
	}
}
</script>

<style scoped>
.pagination-container {
	background: #fff;
	padding: 32px 16px;
}
.pagination-container.hidden {
	display: none;
}
</style>
